Originally Posted by 06MREvo

That's not necessarily true...I am using a 10 psi spring with a 1/4" reinforced vacuum line straight to the manifold with no Ts...My part throttle/cruising is actually pretty good. Its my a/f while cruising and at idle that is terrible.

Originally Posted by EvoJoeIX

probably because the bov isnt fully closed and its messing up your fuel trims. the tial is not a good bov to run on a MAF, end of story

Originally Posted by Boost Demon

"1/4" reinforced vacuum line" is fuel line acceptable? What does it look?

Originally Posted by MarylandEvo

Hey all,

I'm having an issue with my 50mm Tial BOV. When trying to maintain a speed, lets say 50mph, when I let off the gas, the car surges and doesn't blow off as it should. I've taken the BOV and greased it, only to have the issue come back a few days later. Any ideas on what the issue could be? Also, I wanted to note that when the engine is cold upon start up, the BOV will surge under ANY level of boost until the car is fully warmed up. I took the BOV fully apart today and noticed that I have the standard unpainted spring. Apparently there is no way to adjust this BOV without purchasing another spring.

MODS LIST:
- DC sports downpipe
- Burschur catback
- AMS FMIC
- AGP LICP
- TurboTrix UICP
- Tial 50mm BOV
- EvoPowerMods external o2 dump
- Forced Performance 18psi wastgate actuator
- Turbo XS MBC
- Buschur Racing ported stock exhaust manifold
- Aeromotive high flow fuel rail
- Precision 1000cc injectors
- Warlboro high pressure fuel pump
- ACT street disc clutch
- ACT LightWeight flywheel
- ProSport Gauges (Boost, AFR, Oil pressure)

Thanks for your help guys....

Danny

Originally Posted by achilles3000

Yours afr's are off??Is the bov open at idle?A good tune will solve this issu the maf need's to be scald correctly.

Originally Posted by 06MREvo

As far as I know its closed at idle...trust me everything is scaled as it should be...vta bov + stock maf = no bueno...All cars are different and mine hates it...

Originally Posted by achilles3000

Very true every car is different like my car doesn't like lots of * even at one point when I had meth didn't even like that too..

What spring do you have?? Is it the 50 bv or q ??I'm think of trying the black spring on my original.

Originally Posted by 06MREvo

Tial Q, 10 psi spring, perfect spring, 8 psi was way too soft & 11 psi is too stiff...

Originally Posted by EvoJoeIX

bottom line is this is not a good blow off valve to run on a MAF... i dont care if you can tune around the problems to make due

its gonna be very hard to keep the valve closed at idle, have good drivability(i.e. no bucking and surging) and have the valve able to open fast enough when you lift off the throttle so it doesnt have any flutter... the only way to get around this would be to go on speed density, then all you really have to worry about is having the right spring in there to not get any flutter

i am on MAF and run a tial. i have tried every spring they make, even shimmed some springs to make some different spring pressures... i have accepted the fact you cant make this bov perfect on MAF

Originally Posted by achilles3000

Im having the same issue choosing between the white or black now..Tial should charge $250 and include all the springs so everyone can pick the right one without spending pointless money on springs.

Originally Posted by evolvd276

tial Q alpha since you already have the tial flange

Originally Posted by ssg_petty_210

Ok, check your vacuum, and see about getting the correct spring. I would look into a retune with the right one. You should not be having the issues you are having bro. If you have any other questions. Ask KevinD. He can help you out. He is a vendor on here. Evolution Dynamics.

Originally Posted by EvoDom

The car was my car before Danny purchased it. The car was tuned with the tial and my tuner made the car easy to drives possible. I never had one problem at all with surging, idle, etc it was perfect. So something had to have went wrong.

Hope this helps

Dom